<!DOCTYPE HTML>
<html>

<head>
    <meta charset="utf-8">
    <title>菜鸟教程(runoob.com)</title>
    <style>
        .droptarget {
            float: left;
            width: 100px;
            height: 35px;
            margin: 15px;
            padding: 10px;
            border: 1px solid #aaaaaa;
        }
    </style>
</head>

<body>

   
    <div class="droptarget" ondrop="drop(event)" ondragover="allowDrop(event)">
        <p ondragstart="dragStart(event)" ondrag="dragging(event)" draggable="true" id="dragtarget">拖动我!</p>
    </div>
    <div class="droptarget" ondrop="drop(event)" ondragover="allowDrop(event)"></div>
    <!-- <p style="clear:both;"><strong>注意：</strong>Internet Explorer 8 及更早 IE 版本或 Safari 5.1 及更早版本的浏览器不支持 drag 事件。</p> -->
    
    <!-- <p id="demo"></p> -->
    <script>
        function dragStart(event) {
            event.dataTransfer.setData("Text", event.target.id);
        }
        function dragging(event) {
            document.getElementById("demo").innerHTML = " p 元素正在拖动";
        }
        function allowDrop(event) {
            event.preventDefault();
        }
        function drop(event) {
            event.preventDefault();
            var data = event.dataTransfer.getData("Text");
            event.target.appendChild(document.getElementById(data));
            // document.getElementById("demo").innerHTML = "p 元素已被拖动";
        }
    </script>

</body>

</html>